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→Using free RBPi GPIO pins as Extra Switches
==Using All-In-One module or Zynscreen display (MCP23017)==
==Using All-In-One module or Zynscreen display (MCP23017)==
The All-In-One circuit (or the Zynscreen display) can be easily tweaked for adding up to 4 extra switches that can be used for a panic button, a sustain pedal or other MIDI-CC switches (very useful for SooperLooper!).
The All-In-One circuit (or the Zynscreen display) can easily be modified by adding up to 4 extra switches which can be used for a panic button, a sustain pedal, or other MIDI-CC switches (very useful for SooperLooper!).
The unused pins in the MCP23017 are:
The unused pins in the MCP23017 are:
* pin 8 (GPB7)
* pin 8 (GPB7)
The first 2 are bound to INTA and the other 2 to INTB (but that is not really important to you, as it's handle by the zyncoder library ;-)
The first 2 are bound to INTA and the other 2 to INTB
If you have a recent version of the All-In-One circuit (or a Zynscreen display), you are lucky, as it includes an extra row-pin connector (SW1) that allows to easily use this extra GPIO ports. If you don't, you have to solder your wires directly to the MCP23107 pins. Not difficult at all, but a little bit ugly.
If you have a recent version of the All-In-One circuit (or a Zynscreen display), it includes an extra row-pin connector (SW1) that allows to easily use these extra GPIO ports. If you don't, you have to solder your wires directly to the MCP23107 pins.
This is the pin assignment for the row-pin connector (SW1):
This is the pin assignment for the row-pin connector (SW1):
[[File:Zynscreen sw1.jpg|700px]]
[[File:Zynscreen sw1.jpg|700px]]
So, if you have a recent version of All-In-One circuit (or a Zynscreen display), you can follow these simple steps for adding your custom switches:
So, if you have a recent version of All-In-One circuit (or a Zynscreen display), you can follow these simple steps to add your custom switches:
* Update your zynthian
* Update your zynthian
* Solder the 5 row-pin connector to your All-In-One circuit (or Zynscreen display) (SW1)
* Solder the 5 row-pin connector to your All-In-One circuit (or Zynscreen display) (SW1)
* Connect some kind of switch between pins 2-5 and pin 1 (GND). The switches are normally open, closing to pin 1 (GND).
* Connect some kind of switch between pins 2-5 and pin 1 (GND). The switches are normally open, closing to pin 1 (GND).
* From the webconf tool, hardware menu, wiring section:
* From the webconf tool go to the hardware menu => wiring section:
** Select MCP23017_EXTRA as wiring layout (MCP23017_ZYNSCREEN if you have the Zynscreen display). This will set your ZYNTHIAN_WIRING_SWITCHES to “100,103,108,111,106,107,114,115”
** Select MCP23017_EXTRA as wiring layout (MCP23017_ZYNSCREEN if you have the Zynscreen display). This will set your ZYNTHIAN_WIRING_SWITCHES to “100,103,108,111,106,107,114,115”
** Configure the desired actions (advanced options). The UI active layer’s MIDI channel will be used for MIDI actions.
** Configure the desired actions (advanced options). The UI active layer’s MIDI channel will be used for MIDI actions.
You can read more about this subject in the next link:
You can read more about this subject here:
* https://discourse.zynthian.org/t/extra-switches-sw1-sustain-pedal-panic-button-etc/1843
* https://discourse.zynthian.org/t/extra-switches-sw1-sustain-pedal-panic-button-etc/1843
===Example 1: Adding a "Panic Button" to an official v2 zynthian===
===Example 1: Adding a "Panic Button" to an official v2 zynthian===
You could add a panic button to your zynthian box. Simply make a hole, install the switch-button and connect it to SW-1's pins 1 & 2.
You could add a panic button to your zynthian box. Simply make a hole, install the switch-button, and connect it to SW-1's pins 1 & 2.
[[File:Zynthian v2 panic switch.jpeg|700px]]
[[File:Zynthian v2 panic switch.jpeg|700px]]
===Example 2: External 3 switches pedal + sustain pedal===
===Example 2: External 3 switches pedal + sustain pedal===
Our dear friend, @wolfpaw98, has developed this amazing pedal set. He use a MIDI connector (DIN-5) for making available the 5 pins from the case. The main pedal is connected to the DIN-5, and a Jack-mono connector is used for connecting the sustain to the main pedal.
Our dear friend, @wolfpaw98, has developed this amazing pedal set. He uses a MIDI connector (DIN-5) to make the 5 pins from the case accessible. The main pedal is connected to the DIN-5, and a Jack-mono connector is used to connect the sustain to the main pedal.
[[File:Zynthian pedals 01.jpeg|700px]]
[[File:Zynthian pedals 01.jpeg|700px]]
[[File:Zynthian pedals 04.jpeg|700px]]
[[File:Zynthian pedals 04.jpeg|700px]]
You can read more about this subject in the next link:
You can read more about this subject here:
* https://discourse.zynthian.org/t/funny-pedalboxes-for-zynthian-using-extra-switches/3331
* https://discourse.zynthian.org/t/funny-pedalboxes-for-zynthian-using-extra-switches/3331
You can configure a zynthian without controllers (encoders+switches) for using an ancient 2in1 module to get up to 4 extra switches that you can bind to CUIA or MIDI actions.
You can configure a zynthian without controllers (encoders+switches) for using an ancient 2in1 module to get up to 4 extra switches that you can bind to CUIA or MIDI actions.
This is the wiring layout configuration you have to setup in webconf tool:
This is the wiring layout configuration you have to setup in the webconf tool:
[[File:Webconf_noencoders_2in1_extra_switches.png|700px]]
[[File:Webconf_noencoders_2in1_extra_switches.png|700px]]
==Using free RBPi GPIO pins as Extra Switches==
==Using free RBPi GPIO pins as Extra Switches==
In the same way, you can configure any free RBPi GPIO pins as extra switches. You only have to configure the "Switches Pins" in the webconf tool.
In the same way, you can configure any free GPIO pins in the Raspberry Pi as extra switches. You only have to configure the "Switches Pins" in the webconf tool.